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require 'active_support/core_ext/object/inclusion'
module ActiveRecord::Associations::Builder
class HasOne < SingularAssociation #:nodoc:
def macro
:has_one
end
def valid_options
valid = super + [:order, :as]
valid += [:through, :source, :source_type] if options[:through]
valid
end
def constructable?
!options[:through]
end
def build
reflection = super
configure_dependency unless options[:through]
reflection
end
private
def configure_dependency
if options[:dependent]
unless options[:dependent].in?([:destroy, :delete, :nullify, :restrict])
raise ArgumentError, "The :dependent option expects either :destroy, :delete, " \
":nullify or :restrict (#{options[:dependent].inspect})"
end
dependent_restrict_deprecation_warning if options[:dependent] == :restrict
send("define_#{options[:dependent]}_dependency_method")
model.before_destroy dependency_method_name
end
end
def define_destroy_dependency_method
name = self.name
mixin.redefine_method(dependency_method_name) do
association(name).delete
end
end
alias :define_delete_dependency_method :define_destroy_dependency_method
alias :define_nullify_dependency_method :define_destroy_dependency_method
def dependency_method_name
"has_one_dependent_#{options[:dependent]}_for_#{name}"
end
end
end
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